12233231220 has 144 divisors (see below), whose sum is σ = 39899055168. Its totient is φ = 2792401920.

The previous prime is 12233231183. The next prime is 12233231233. The reversal of 12233231220 is 2213233221.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2587779 + ... + 2592501.

It is an arithmetic number, because the mean of its divisors is an integer number (277076772).

Almost surely, 2^12233231220 is an apocalyptic number.

12233231220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12233231220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19949527584).

12233231220 is an abundant number, since it is smaller than the sum of its proper divisors (27665823948).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12233231220 is a wasteful number, since it uses less digits than its factorization.

12233231220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5630 (or 5621 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 12233231220 its reverse (2213233221), we get a palindrome (14446464441).

The spelling of 12233231220 in words is "twelve billion, two hundred thirty-three million, two hundred thirty-one thousand, two hundred twenty".